Purpose :
Purpose: To compare the effect of eye rubbing on Scheimpflug imaging parameters and corneal biomechanics on keratoconus and normal eyes.

Methods :
Methods: Prospective cohort study including 31 normal eyes and 31 keratoconus eyes that attend to the Institution between January 2017 and November 2017. Patients performed standardized eye rubbing during 2 minutes; pre and immediately after eye rubbing, the tests were taken in minute 1, 7 and 14. More than 25 parameters from the Pentacam HR (Oculus GmBH, Wetzlar, Germany) derivatives of the curvature, elevation and pachymetry maps and 6 parameters from the Ocular Response Analyzer (ORA, Reichert Ophthalmic Instruments, Depew, NY) were measured and compared between normal and keratoconus eyes. Statistical analysis was performed using Stata 13.

Conclusions :
Conclusions: Both normal and keratoconus group had significant changes in corneal hysteresis parameters after eye rubbing. However keratoconus group experienced greater variability on the changes in the keratometry and elevation parameters when compared with normal eyes.

This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.